export const generateUUID =()=> {
    let timestamp = new Date().getTime();
    const uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
      const r = (timestamp + Math.random() * 16) % 16 | 0;
      timestamp = Math.floor(timestamp / 16);
      return (c === 'x' ? r : (r & 0x3 | 0x8)).toString(16);
    });
    return uuid;
  }